JP3004962U - Gas analyzer cooling device - Google Patents

Abstract

(57) [Summary] [Purpose] A gas analyzer that can improve the water separation capacity and indicating stability of the drain separator, prevent dust from entering the case body, and reduce the temperature rise in the case body. To provide a cooling system of. [Constitution] A case body 1, an optical bench portion 5 housed in the case body 1 and comprising a light source 2, a measuring cell 3 and a detector 4, and a case body 1 for separating a drain D from a sample gas S A drain separator 6 provided on the front surface H and a cooling fan 7 are provided. Further, an air suction port 9 to which a dust filter 8 is attached is provided in the case body 1, and air flowing from the air suction port side toward the light source side. Introduction route 1
A dust filter 8, a drain separator 6, a cooling fan 7, and a light source 2 are sequentially arranged along the line 0.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cooling device for a gas analyzer, for example, a cooling device included in an exhaust gas measuring device for vehicle maintenance inspection used for measuring vehicle exhaust gas during vehicle inspection (vehicle inspection).

[0002]

[Prior art]

As shown in FIG. 4, a conventional cooling device of this type includes a case body 21, an optical bench portion 25, which is housed in the case body 21, and includes a light source 22, a measurement cell 23, and a detector 24, and a sample gas. In order to separate the drain D from S to obtain the dehumidified sample gas S ₁ , the drain separator 26 provided in the case main body 21 and warm air in order to reduce the temperature rise in the case main body 21 A cooling fan 27 for exhausting air from the inside to the outside of the case body 21 is provided, and further, dust filters 28 and 29 are attached to both side surfaces of the case body 21, respectively.

[0003]

[Problems to be solved by the device]

 However, the above conventional cooling device has the following problems. That is, in FIG. 4, since the wind direction by the cooling fan 27 is the direction from the inside of the case main body 21 to the outside of the case main body 21 as described above, the case gap N (for example, the figure shown in FIG. Dust easily enters from (3). Since the drain separator 26 that removes water (drain) D that adversely affects the optical bench section 25 is provided on the front surface H of the case main body 21, the cooling fan 27 is provided on the rear surface R of the case main body 21. The cooling effect of the cooling fan 27 on the drain separator 26 was low, and therefore the water separating ability of the drain separator 26 was also low. Since the wind direction by the cooling fan 27 is from the inside of the case main body 21 to the outside of the case main body 21, the light source 22 which is a heating element mounted inside the case main body 21 cannot be directly cooled by the cooling fan 27, so that the drainage is prevented. As with the separator 26, the cooling effect is also low, so that it is difficult to stabilize the temperature of the light source 22 immediately, and the measurement instruction value is not stabilized (instruction stability is poor). The warmed air in the case body 21 is not sufficiently ventilated by the heating element such as the light source 22, so that the temperature rise in the case body 21 is large.

The present invention has been made in consideration of the above points, and an object of the present invention is to improve the water separation capacity and the indicating stability of the drain separator and to provide the case body itself with the same. (EN) It is possible to prevent dust from entering through a gap in a case and to provide a cooling device for a gas analyzer that can reduce a temperature rise in the case body.

[0005]

[Means for Solving the Problems]

 The technical means taken by the present invention to achieve the above object are as follows. That is, the cooling device for a gas analyzer according to the present invention comprises a case body, an optical bench section, which is housed in the case body and comprises a light source, a measuring cell and a detector, and a case for separating the drain from the sample gas. It is equipped with a drain separator provided in the main body and a cooling fan.In addition, the case main body is provided with an air suction port to which a dust filter is attached, and along the air introduction path extending from the air suction port side to the light source side. The dust filter, the drain separator, the cooling fan, and the light source are sequentially arranged.

[0006]

[Action]

 An air inlet with a dust filter attached to the case body is provided, and the dust filter, drain separator, cooling fan, and light source are sequentially arranged along the air introduction path from the air inlet side toward the light source side. Since the separator is positioned in the direction of the wind by the cooling fan and before and after the cooling fan, the cool air (air) from the outside of the case body that has passed through the drain separator can be used directly to cool the light source. In this way, by improving the cooling performance, it is possible to improve the water separation capacity by air cooling in the drain separator, and also cool the light source to improve the instruction stability.

Moreover, since the airflow direction is formed by the cooling fan in the direction of exhausting air to the outside of the case body through the case gap of the case body itself, it is possible to prevent dust from entering through the case gap.

Further, since the improvement of the water separation capability and the stabilization of the instruction by cooling the light source are performed by one cooling fan, the cooling performance can be improved, and the space can be saved and the cost can be reduced.

Further, in order to reduce the temperature rise inside the case body, warm air can be discharged from the inside of the case body to the outside of the case body through an air outlet provided in the case body and a case gap.

[0010]

【Example】

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, a cooling device for a gas analyzer A includes a case main body 1, an optical bench section 5 including a light source 2, a measurement cell 3 and a detector 4 housed in the case main body 1, and a sample. In order to obtain the dehumidified sample gas S ₁ by separating the drain D from the gas S, a drain separator 6 provided on the front surface H of the case main body 1 and a cooling fan 7 are provided. An air suction port 9 having a dust filter 8 attached thereto is provided, and a dust filter 8, a drain separator 6, a cooling fan 7 and a light source 2 are sequentially arranged along an air introduction path 10 extending from the air suction port side to the light source side. ing.

The cool air (air) introduced into the case body 1 by the cooling fan 7 is warmed in the case body 1, and the air outlet 11 for discharging the warmed air to the outside of the case body 1 is formed in the case body 1. The exhaust port 11 is provided on the rear surface R of No. 1 and has a plurality of notches. On the other hand, the dust filter 8 is configured to be replaceably attached to the air suction port 9.

Further, the drain separator 6 separates water in the sample gas S by cooling with cold air (air) from the outside of the case body. Then, the separated drain D passes through a drain pipe 14 equipped with a strainer (not shown) and a pump (not shown), and is discharged to the outside of the case body.

On the other hand, in the sample gas pipe 15 for feeding the sample gas S ₁ separated into water into the measurement cell 3, a dust filter (not shown), a solenoid valve for switching the sample gas S ₁ and air (zero gas), and a pump Is equipped with.

FIG. 2 shows the front surface H of the case body 1. In FIG. 2, 16 is a liquid crystal display plate for digitally displaying CO, HC, and CO ₂ concentrations (measurement instruction values) in the sample gas. Further, on the front surface H of the case body 1, a measurement switch M, a hold switch 17 for holding a measurement instruction value that changes from moment to moment, a function key F for setting a calibration gas concentration, and a liquid crystal display panel. An adjustment key 18 for adjusting the brightness of 16 is provided.

Further, as shown in FIG. 3, the exhaust gas of the automobile 19 can be measured by inserting the sampling probe P 1 into the exhaust pipe 20 of the automobile 19 and sending the sample gas through the sampling tube T to the drain separator 6. .

Since this embodiment has the above-mentioned structure, the case body 1 is provided with the air suction port 9 to which the dust filter 8 is attached, and the dust is introduced along the air introduction path 10 extending from the air suction port side to the light source side. The filter 8, the drain separator 6, the cooling fan 7 and the light source 2 are arranged in this order, and the light source 2 and the drain separator 6 are positioned in the direction of the wind by the cooling fan 7 and in front of and behind the cooling fan 7. Cold air (air) from the outside of the case body 1 that has passed through the separator 6 can be used directly for cooling the light source 2. Therefore, in the drain separator 6, the water separation ability by air cooling can be improved, and the light source 2 can also be cooled to improve the pointing stability.

Further, in order to reduce the temperature rise in the case body 1, warm air can be discharged from the case body 1 to the outside of the case body 1 through the case gap N and the air outlet 11.

As described above, in this embodiment, the suction air of the cooling fan 7 is directly applied to the drain separator 6 and the flow thereof can be used as it is for cooling the light source 2. Therefore, the water separation capacity by air cooling and the light source cooling can be used. The pointing stability can be improved, and the dust filter 8 is a replaceable type, which can be easily replaced as needed.

In short, in this embodiment, the improvement of the water separation and the stabilization of the instruction by the cooling of the light source are performed by the single cooling fan 7, and the replaceable dust filter 8 is used, so that the cooling performance can be improved. At the same time, the airflow direction is formed by the cooling fan 7 in the direction of exhausting air to the outside of the case body 1 through the case gap N of the case body 1 itself, so that dust can be prevented from entering from the case gap N, and The temperature rise in the case body 1 can be reduced.

[0020]

[Effect of device]

 As described above, according to the present invention, the case body is provided with the air suction port to which the dust filter is attached, and the dust filter, drain separator, and cooling fan are provided along the air introduction path extending from the air suction port side to the light source side. Since the light source and the drain separator are arranged in the direction of the air flow by the cooling fan and before and after the cooling fan, the cold air (air) from the outside of the case body that has passed through the drain separator is placed. Can be used directly for cooling the light source. By improving the cooling performance in this way, the water separation capacity of the drain separator by air cooling can be improved, and the light source can also be cooled to improve the pointing stability.

Moreover, since the airflow direction is formed by the cooling fan in the direction of exhausting air to the outside of the case body through the case gap of the case body itself, it is possible to prevent dust from entering through the case gap.

Further, since the improvement of the water separation capability and the stabilization of the instruction by cooling the light source are performed by one cooling fan, the cooling performance can be improved, and the space can be saved and the cost can be reduced.

Further, in order to reduce the temperature rise in the case body, warm air can be discharged from the case body to the outside of the case body through the case gap.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the overall configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a front surface of the gas analyzer in the above-mentioned embodiment.

FIG. 3 is a diagram showing an exhaust gas measurement of an automobile.

FIG. 4 is an explanatory diagram of an overall configuration showing a conventional example.

[Explanation of symbols]

1 ... Case body, 2 ... Light source, 3 ... Measuring cell, 4 ... Detector, 5 ... Optical bench section, 6 ... Drain separator, 7 ... Cooling fan, 8 ... Dust filter, 9 ... Air inlet, 10
... Air introduction path, A ... Gas analyzer.

Claims (3)

[Scope of utility model registration request] 1. A case main body, an optical bench portion, which is housed in the case main body, and includes a light source, a measurement cell, and a detector, and a drain separator provided in the case main body for separating drain from sample gas, A cooling fan is further provided, and an air suction port to which a dust filter is attached is provided in the case body, and the dust filter, drain separator, and cooling fan are provided along an air introduction path extending from the air suction port side toward the light source side. And a cooling device for a gas analyzer in which the light sources are sequentially arranged. 2. The gas analyzer according to claim 1, wherein the case body is provided with an exhaust port for exhausting the air introduced into the case body by the cooling fan to the outside of the case body, and the exhaust port comprises a plurality of notches. Cooling system. 3. The cooling device for a gas analyzer according to claim 1, wherein the dust filter is replaceably attached to the air suction port.